20481576 has 32 divisors (see below), whose sum is σ = 52857600. Its totient is φ = 6606720.

The previous prime is 20481557. The next prime is 20481577. The reversal of 20481576 is 67518402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20481577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13021 + ... + 14508.

It is an arithmetic number, because the mean of its divisors is an integer number (1651800).

Almost surely, 2^20481576 is an apocalyptic number.

It is an amenable number.

20481576 is an abundant number, since it is smaller than the sum of its proper divisors (32376024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20481576 is a wasteful number, since it uses less digits than its factorization.

20481576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27569 (or 27565 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 20481576 is about 4525.6575212890. The cubic root of 20481576 is about 273.6031693145.

Adding to 20481576 its reverse (67518402), we get a palindrome (87999978).

The spelling of 20481576 in words is "twenty million, four hundred eighty-one thousand, five hundred seventy-six".